#!/bin/bash

set -x
set -e
mount --rbind /host/dev /dev

volume=$1
size=$2
frontend=$3

if [ -z $volume ]
then
        echo "Usage: launch-simple-longhorn <volume_name> <frontend> "
        echo "<volume_name>: Required. User defined volume name"
        echo "<frontend>: Optional. By default 'tgt-blockdev'. "
	exit -1
fi

if [ -z $size ]
then
        echo Use default size 1g
        size="1g"
fi

if [ -z $frontend ]
then
        echo Use default frontend TGT block device
        frontend="tgt-blockdev"
fi

function start() {
    set +e
    while true;
    do
        /usr/local/bin/grpc_health_probe -addr localhost:8500
        if [[ $? -eq 0 ]];
        then
            echo longhorn instance manager is ready
            break;
        fi
        sleep 1
    done
    set -e

    tgtd -f 2>&1 | tee /var/log/tgtd.log &

    longhorn-instance-manager process create --name "$volume-r" --binary /usr/local/bin/longhorn --port-count 15 --port-args "--listen,localhost:" -- replica /volume/ "--size" $size

    # wait for the replica to be started
    sleep 5

    longhorn-instance-manager process create --name "$volume-e" --binary /usr/local/bin/longhorn --port-count 1 --port-args "--listen,localhost:" -- controller $volume --frontend $frontend --replica tcp://localhost:10000
}

start &

exec longhorn-instance-manager daemon
